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Notification Of Interest In Total Voting Rights

May 15, 2008. London, UK

A form TR-1 containing the following information has been received by the Company.

TR-1 notification of major interests in shares

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

Nviro Cleantech Plc

2. Reason for the notification
Acquisition of voting rights

3. Full name of person(s) subject to the notification obligation:
National Grid UK Pension Scheme

4. Full name of shareholder(s) (if different from 3):
Stargas Nominees Ltd

5.Date of the transaction (and date on which the threshold is crossed or reached if different):
13 May 2008

6. Date on which issuer notified:
13 May 2008

7. Threshold(s) that is/are crossed or reached: 3%, 4%

8. Notified details: Purchase of 1,000,000 shares , New total Holding = 1,793,651

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE	Situation previous to the Triggering transaction		Resulting situation after the triggering transaction
	Number of Shares	Number of Voting Rights	Number of Shares	Number of Voting Rights		% of Voting Rights
			Direct	Direct	Indirect	Direct	Indirect
IM00B1Z8BS02	793,651	793,651	1,793651	1,793,651		4.093%

B: Financial Instruments

Resulting situation after the triggering transaction
Type of financial instrument	Expiration date	Exercise/ Conversion  Period/ Date	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights

Total (A+B)

Number of voting rights	% of voting rights
1,793,651	4.093%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

Beneficial Owner: National Grid UK Pension Scheme

Nominee Name: Stargas Nominees Ltd

Fund Manager: Aerion Fund Management Ltd
(Owned by National Grid UK Pension Scheme)

Proxy Voting:
10. Name of the Proxy holder:
Bank of New York (Custodian Bank)

11. Number of voting rights proxy holder will cease to hold:
N/A

12. Date on which proxy holder cease to hold voting rights:
N/A

13. Additional information:
N/A

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